Downgraded composer dependencies to also fit php7.3 (OpenMage#2576)

Author: sreichel

composer.json

@@ -28,10 +28,11 @@
     "dealerdirect/phpcodesniffer-composer-installer": "^0.7.2",
     "friendsofphp/php-cs-fixer": ">=3.4",
     "macopedia/phpstan-magento1": "^1.0.4",
-    "magento-ecg/coding-standard": "^4.4",
+    "magento-ecg/coding-standard": "^4.5",
     "phpcompatibility/php-compatibility": "^9.3",
     "phpmd/phpmd": "^2.12",
-    "phpstan/phpstan": "^1.8.3",
+    "phpstan/phpstan": "^1.8.5",
+    "phpunit/phpunit": "^9.5",
     "squizlabs/php_codesniffer": "^3.7"
   },
   "conflict": {